Malicious PDF — malware analysis report

Static analysis result for SHA-256 9320490541bf2376…

MALICIOUS

PDF

99.7 KB Created: 2021-04-06 19:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0ba294c4f7dfd31e9f4f5264cee67ebd SHA-1: 22fb4c9155fce749fe0a753fdbff7ad35b01ef73 SHA-256: 9320490541bf23765efaf1c315a261d3ffcf474c4feb9d15b9014cf25e753c85
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/strik?utm_term=samsung+s5+active+price+in+bangladesh PDF link annotation
    • http://fepemewavitik.66ghz.com/rarotozeginipitojeb.pdfIn PDF document text
    • http://dimefovolij.iblogger.org/windows_defender_update_free.pdfIn PDF document text
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/4bf95edb5.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/foxesedazusi.pdfIn PDF document text
    • https://sagogekur.weebly.com/uploads/1/3/4/4/134469423/zuselarox-vaturamaliw-penosilonex-nosoge.pdfIn PDF document text
    • https://sobiwololisa.weebly.com/uploads/1/3/0/9/130969717/xorapafuludovebok.pdfIn PDF document text
    • https://bekedurid.weebly.com/uploads/1/3/0/8/130874189/naziku.pdfIn PDF document text
    • http://hookup754.fun/33999177397telc1.pdfIn PDF document text
    • http://apeech.ru/zorakigtctl3.pdfIn PDF document text
    • https://lerozezowigex.weebly.com/uploads/1/3/0/7/130776164/rozuxidos.pdfIn PDF document text
    • http://vimoroketoburiv.22web.org/albendazole_vs_mebendazole.pdfIn PDF document text
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/samoxifobol.pdfIn PDF document text
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/b644762d76.pdfIn PDF document text
    • https://titamifafipife.weebly.com/uploads/1/3/4/3/134315234/d0f6744197a761.pdfIn PDF document text
    • https://veborejekeraleb.weebly.com/uploads/1/3/4/4/134480613/dekoginebejiven_mujav_lamopasuxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://narapubof.epizy.com/grimoire_meaning_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71cb2ab9-b0bc-4208-abf4-61586ed82e61/asp.net_core_mvc_routing_examples.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/adapter_notifydatasetchanged_not_working_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfeba071-9f48-4c07-b749-2f4e8e215418/americas_book_of_secrets_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51cd513-ab08-43ce-b768-8fe03017b5ec/78965162649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bbae97-37ba-49c1-ae3f-a7b64d53ae36/37167891160.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 5912 bytes
SHA-256: 82e2eb0f42a9b436b8af13fa1e6cb3af5c5eea12716058668bc05a7ede97b7ae
font_01_sfnt_off00011003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 2196 bytes
SHA-256: 89ee13d965f0d17a8821df9dea7c8d0d7dfb913388888ed0e5338c4e4b275a29
font_02_sfnt_off00011995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11995 3852 bytes
SHA-256: bab409afe3c8865ebc5a9c997a7c4378b4f92ef5165b900e12cd9fba1f26d62c
font_03_sfnt_off00012554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12554 2800 bytes
SHA-256: 1fe8b5a92c166e512656d86ad50560a9ebd38fe4dbee5671ff8f7d8424607e38
font_04_sfnt_off00013001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13001 13428 bytes
SHA-256: 94cb0863cdd3c440ec4047aaeb27a6378686884dc374851830c607cbda425d08
font_05_sfnt_off00015d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0B 16912 bytes
SHA-256: 59413b83f0f2659880f68cb8867a51d92a69f12444b6ebb003d9d2f78937855d
font_06_sfnt_off00017578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17578 2416 bytes
SHA-256: a02d53b2a961d71c57e14379c397adf812b386efe4f9c1f53187a572d41e1190

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